e82fc4a775
- UpdateParamsCommand with execute/undo for color/speed/direction/length - Uses module-level currentShowId (not this._showId) matching existing pattern - BlockInspector renders compact strip with animation label, color swatch, speed input, direction select, length input, and remove button - Color change committed on 'change' event (not 'input') to avoid command flood - _onDelete callback wired to remove button for app.js to handle